The Use of URLs as Meta-Syntax for Core Mail List Commands and their Transport through Message Header Fields, July 1998
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The mailing list command specification header fields are a set of structured fields to be added to email messages sent by email distribution lists. By including these header fields, list servers can make it possible for mail clients to provide automated tools for users to perform list functions. This could take the form of a menu item, push button, or other user interface element. The intent is to simplify the user experience, providing a common interface to the often cryptic and varied mailing list manager commands. [STANDARDS-TRACK]
For the definition of Status, see RFC 2026.
For the definition of Stream, see RFC 8729.